Leviticus 8:18

"And he presented the ram of the burnt-offering: and Aaron and his sons laid their hands upon the head of the ram. And he killed it; and Moses sprinkled the blood upon the altar round about. And he cut the ram into pieces; and Moses burnt the head, and the pieces, and the fat. And he washed the inwards and the legs with water; and Moses burnt the whole ram upon the altar: it was a burnt-offering for a sweet savor: it was an offering made by fire unto Jehovah; as Jehovah commanded Moses."

The variations in this once-for-all ceremony, with Moses officiating, from instructions provided in Leviticus 1-7 are in no sense evidence of "various sources" or "different traditions." The differences were required by the unique circumstances of this initial establishment of the priesthood of Israel. Never again would Moses officiate at these sacred altars, a duty reserved to the anointed priests and the High Priest of the new institution making its formal appearance in this chapter. The instance of the ram offered here being referred to as a sweet-savor shows that it was one with the peace-offering.